Alarm apparatus



March 30, 1926. 1,579,150

0. sANDwEIss ALARM APPARATUS Filed April 4, 1921. '2 Sheets-Sheet 1 Mara: so ,1926. 1.519,150

' 0'. SANDWEISS ALARM APPARATUS Filed April '4 1921 2 Sheets-Sheet 2 Patented Mar 30, 1926.

UNHTED STATES isiaisa earner orrics.

OSCAR SANDW'EISS, OF ST. LOUIS, MISSOURI.

ALARM Arranarus.

Application filed April 4,

TolaZZ w/tom it may concern:

.Be it known that I, Osoau SANnwnIss, a

subject of Russia, residing at the city of StfLouis, State of lilissouri, have invented a certain new and useful Improvement in Alarm Apparatus, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof. I This invention relates generally to alarm apparatus, and, more particularly, to certain new and useful improvements in alarm apparatus otthe type or class designed especially forthe protection of buildings, of V iices, stores, andthe like to give an alarm,

either localbr distant, upon unauthorized, orattempted unauthorized, entrance thereiIitO. i V

The principal object of my present invention is to provide an alarm apparatus of the class mentioned which may be conveniently and inexpensively installed'upon and about the premises to be protected and which is eiiicient and effective in sounding or giving an alarm upon an unauthorized entrance into the protected premises.

Another object of my invention is to provide an apparatus of this type in which the sources of electrical energy and controlswitches of the apparatus are compactly centralized, whereby care and supervision thereof may be accomplished from a single point and the expense of maintenance of the system or apparatus minimized.

,A further object of my invent on is to provide an apparatus of this type including a cabinet in which is housed the control switches of the alarnilcircuit or circuits, and of Which cabinet a movable element, such as a door orclosure, is equipped with an electromechanical lock adapted for release actuation on a breaking of the protection circuit, the zontrol switches and cabinet-door having such co-operation that the control switches are automatically closed, on an opening of the door, to actuate the alarm circuits.

' vA'still further object of my present invention is to provide an apparatus ofthis type including a key-operated switch located in the system at preferably one of the protected openings of the premises, whereby an authorized entrance or exit may be made through such opening without etfecting an alarm.

lVith the above and other objects in view, my present invention resides in the novel 1921. Serial No. 458,324.

construction, arrangement, and combination of parts hereinafter described and afterwards pointed out in the claims.

In the accompanying drawings,

Figure 1 is a diagrammatic view illustrating the arrangement of-the elements and,

electric circuits of an alarm apparatus em.- bodying my invention;

Figure 2 1s a vertical sectional view of a cabinet forming part of the apparatus which encloses and houses service, alarm, and control devices of the apparatus, and whose like reference-characters refer to like parts.

throughout the several views, 1 2 designate the wire ofthe'main protecting or alarm circuit, which as will be understood, is: suitably strung about the premises to be protected, and included in series with which are the openings of the premises, such as the window 3 and door 4, to be protected. In the present instance and for the purposes of illustration, I show one only of the win- 'dows and doors to be protected, but obviously any number thereof may be included 1n series in the main wire 12. Included in the wire 12 at each of said openings,

is preferably a socalled switch or circuit making and breaking device 5, having connection with the window or door, as the case may be, in such manner that the switch, and consequently the main circuit, is normally closed when the window or door is closed and intact and automatically opened when the window or door is opened or its glass or other portions broken, as will be well understood. i

Forming substantially apart of themain circuit, and leading from 'wire 12 to one terminal 6 of a relay or other suitablev magnet coil 7, is a wire 2, and leading from the other terminal 8 of the relay-coil 7 to one side of a battery 9,1s a wire 10, interposed in which for manual operation 18 a suitable and breaking deothcr mam wire of battery 9, is a switch or circuit making vice l1; connecting the l-2 to the opposite side branch wire 12.

The battery 9, as well as other instruments of the apparatus, as later herein more fully appearing, are preferably contained and housed within a suitable apertured cabinet or the like 13, which may be suitably located upon the premises to be protected or elsewhere, as may meet the requirements of any particular installation; and preferably arranged upon a shelf or the like let disposed within the cabinet 13, is the relay 7 in circuit with the main wire l2 as described.

Included in and forming substantially part of the relay 7, is the usual bridge contact or terminal 15, and 16 indicates the spring-pulled movable armature of the relay-coil, the bridge-contact having electrical connection through a wire 1'? with the terminal-post- 18 of the relay, and the armature 16 having electrical connection through a. wire 19 with the other terminal post 20 of the relay.

Hinged upon the cabinet 13 :tor closing its aperture, is a door or other suitable member 21' provided with a spring-bolt 22 adapted for co-operation with a movable keeper 2? operatively mounted within the cabinet, as best seen in Figure 2, for releasably locking the door or other member 21 in closed or normal position. The keeper 23 is normally held yieldingly in bolt-engaging position by means of a spring 2t and is formed or provided with a so-called armature 25 adapted for actuation electrically out of locking engagement with the bolt to permit the door or other member 21 to open or move to release position by means of an electro-magnet mounted within the cabinet 13 with its core 2? in operative relation to the armature seen in Figure 1, one terminal of the magnet 26 in electrical connection through a wire 28 with one side of a battery preterably housed in the cabinet 18, and its other terminal is in electrical connection by means of a wire 30, included in which is a suitable switch 31 and a special lockswitch 32 hereinafter more fully described, with the relay-post 1S. Electrically connecting relay-post 20 with the opposite side of battery 29, is awire 33.

Disposed within the cabinet 13 adjacent the door 21, is preferably a spring switch 3% in circuit by means of wires 36, and 38 and a source of current 3% with suitable visible signalling devices, such, for instance, as incandescent lamps disposed about the premises to be protected or at a distance therefrom, as may be desired, to give a visible alarm on an unauthorized entrance into the protected premises.

Mounted within the cabinet 13 for movement between the door 21 and switch 34, is a push-stem 39 adapted under pressure of the door 21 when the same is in normal closed position, as seen in Figure 2, to engage the switch ll to open the signalling lamp circuit.

A second switch it) constructed, lo "ated, and operating similarly to the switch 3% is provided for the actuation of a local audible signal. such a bell 11, wl ich is in normally open circuit through the switch it and wires -12, i and l-l, with a third ce ot' electrical energy, such as the bati-:), also housed within the cabinet 13. iiilcewise a switch -16, also similar in construction, location, and operation to the switches ZE-l and -10, is provided for the actuation ot a distant audible alarm, such as the second bell 1-7, which is in normally open circuit with the switch L6 and battery 11:5 through wires to, it), 43, and 50.

in eulina' the local audible signal, namely, the bell 4-1, I provide within the cabinet 13 a dctonatca', such as the gun 51, wlmse trigger 52 connected with the door 1 1 for actuation when the door or other member 21 opens or moves to release position by means ol a detachable hook link or other suitable means 53.

The -lock-switch or key-controlled switch )2 included in the circuit of the magnet 26 5* installed at one ol the protected openl'or instance, the door -1 'lhis witch 32, which is illustrated in detail I3 and i, is preferably, as here ot a well known type. to the body of which is secured an insulating block 54: upon which are mounted spaced contacts in connection electrically with the e l, as seen in Figure 1. To the barreh ot the lock is secured a blade 57, which is movable, as by the key 58, to comllete or break the wire at the contacts 55-:' In Figure the blade 57 is shown s moved the key 58 to break the wire Ill) and consequently open the circuit of the coil 26, and it will be obvious that upon a movement oi the key to close the lock 32, the blade 57 will be actuated to bridge the contacts as in Figure 1, and thereby complete the wire 30 to close the circuit of the coil 26.

Suitably mounted within the cabinet 13, as seen in Figures 1 and 2, is a suitable spring or the like 59 which is put under eompre 'ion by and when the door 21 is n closed position and which functions to force the door 21 out of closed position when keeper 3 is retracted or drawn out of locking engagement with the doorbolt 22.

In use or ope ,aion. switch 11 being closed. the main or protecting circuit is normally closed when all the several protected windows, doors or other openings or the like included in series in the main circuit are closed, and when the main circuit is so closed, the relay-coil 7 is constantly energized to electrically or magnetically hold the armatlire-member '16 against the pull of its retracting spring out of electrical engagement with the relay contact 15, or in the position thereof illustrated in full lines in Figure 1. With the relay-contact or armature 16 so held out of engagement with contact 15, it will be observed that the circuit of the lock-actuating magnet coil 26 is further broken at the relay 7.

Presuine now that, as in night-time, for instance, switch 31 has been actuated to closed position and the blade 57 of lock switch 32 actuated to bridge the contacts 55, the circuit of magnet-coil 26 being thus closed at both the switches 31 and 32 and the main circuit also closed as before described. Should now unauthorized in gress into the protected premises be attempted through any of the protected openings, as, for instance, through window 301' door at, the normally closed main circuit will be at once automatically broken, whereupon relay-coil 7 is tie-energized and armaturemember 16 atonce permitted under the pull of its retracting spring to engage electrically with contact 15, as shown by dotted lines in Figure 1. Thereupon wires 30-33 of the circuit of coil 26 are electrically connected.

through wire 17, armature 16, andire 19, and the circuit of coil 26' thus completely closed and magnet-coil 26 energized to attract keeper-armature 25 to draw keeper 23, against the tension of its spring 24, out of locking engagement with the door 21. The door 21 being so released and permitted to move orswing to open or release position, spring 59 functions to force the door 21 sharply open. In such movement of the door 21,'the several pushstems 39 move yieldingly out of engagement with their respective co-operating switches 34-, 40, and 46, whereupon the several alarm circuits are completed or closed through said switches and lights 37, local bell 41, and distant'bell 47 energized and actuated to give a most decided alarm, the detonator or gun 51 being also actuated through the pull on its trigger 51 imparted thereto on the forcible opening of the door 21. The door 21 thus performs not only the function of a closure for the aperture of the cabinet 13, but also the additional function of a circuit maker and breaker through the several carried projections or push-stems 39 for the several alarm circuits.

An opening of the switches 11 and 31 serves to conveniently open the entire system when, as in the day-time, alarm service upon the premises is not desired. The lock-switch 32 is further of such type that the key 58 the keys of such locks are withdrawn. 0011- sequently, the switch 31is utilized to break the circuit of coil 26 when the main circuit is not in service, as, for instance, in the daytime, or whenever it is desired to cut the several alarm circuits out of service. Now, in order that the proprietor of the protected premises or other authorized person may eilect egress from, or ingress into, the protccted premises without effecting an alarm when both the main circuit and also the switch 31 are closed, the key 58 is inserted into lock 32 and barrel 56, and its blade 57 actuated to unlocking position to open the lock and also break the circuit of coil 26 at the contacts 555. lVith the circuit of coil 26 so broken, it will be vident that authorized entrance or exit from the protected premises may be made without eiiect ing an alarm, although the main circuit is broken, the circuit of coil 26 being again completed, so far 'as'lock 32 is concerned, when the barrel and its carried blade 57 have been turned to locking and contactbridging position.

In order that the proprietor of the pro tected premises or other authorized person may readily ascertain whether or notthe main protecting circuit is closed and the several openings or thelikeineluded in the circuit are guarded, 1 provide the system with a testing device comprising an audible or other suitable signalling or indicating member, such as a buzzer 60. One terminal of the buzzer 60 is connected by a wire 61 with one side of the battery 29, included in and forming part of which wire 61 is a normally open testing switch 62. The other ter ninal of the buzzer 60is electrically connccted by a' ire 63 with the relay-contact 15.

As has been stated, when the main circuit is in service and fully or normally closed, both by switch 11 and the several circuit making and breaking devices at the protected openings, the relay arinature-mem ber 16 is held under the energy of coil 7 out of electrical contact with the relaycontact 15, and that whenever the main circuit is broken, the armature-member 16 engages electrically with the contact-member 15. Consequently, on an opening of magnet-circuit switch 31 and a closing of the testing switch'62 to test the main circuit, should the buzzer fail to buzz the proprietor is at once aware that the main-circuit is fully closed and working. On the other hand, should the buzzer 60 buzz, the proprietor is informed that the main-circuit is open at some point and not working,the buzzer circuit in such later event being completed from contact 1:") through the armature member 16, wire 19, and wire 33 to the other side of the battery 29.

The alarm apparatus as a whole is simple in form and arrangement, ma be convenientl and incxpensivel installed is GT -I('C0(l .ingl fiexible, and is most eliicient in etiecting under the conditions described both 10 *al and distant alarms.

I am aware that changes in the construction, arrangement, and combination of the several parts of my new alarm app: rates may be made and substituted for those herein show 1 and described without departing from the natu e and principle of my invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. An electric alarm apparatus comprising. in combination with an apertured enclosing cabinet, a movable closure for the aperture of the cabinet, an electrically actuable spring bolt l'or nornmlly releasabl locking the closure in aperture closing position, and a spring for actuating the closure when released by said bolt, a normally closed ma'n circuit including a magnet coil concealed in the cabinet, a second circuit includin a second magnet coil and a switch also concealed within the -abinet. said switch being magnetically controlled by the first magnet coil to open the second circuit when the main circuit closed and adapted to close the second circuit on an opening of the main circuit, an alarm circuit including a second ci 'cuit closingswitch disposed within the cabinet, and a projection on the closure adapted, when the closure is in apertured closing position for engagement with the Second switch to open the alarm circuit, said second switch being adapted to automatically close the alarm circuit when said projection is out of engagement therewith and the second magnet being adapted on a closing of the second circuit to actuate said bolt to release the closure for actuation by said spring to carry said projection out of circuit opening engagement with the second switch.

2. An electric alarm appa 'atus comprising, in combination with an apertured enclosing cabinet, a swingable closure tor the aperture of the cabinet, an elcctricull actuable spring-bolt i'or normally releasabl) locking the closure in' apcrturcd closing position, and a spring for swinging the closure when released by said bolt. a normal 5' closed main circuit including a magnet coil within the cabinet, a second circuit including a second magnet coil and a switch also disposed within the cabinet. said switch being magnetic-all controlled by the first magnet coil to open the second circuit when the main circuit is closed and adapted to close the second circuit on an opening of the main circuit, an audible signal within the -abinet, an alarm circuit including a second circuit-closing switch disposed within the cabinet, a push-stem on the closure adapted, when the closure is in aperture closing position, t'or engagement with the second switch to open the alarm circuit, said second switch being adapted to automatically close the larm circuit when said pushstem iS out of engagement therewith and the second magnet being adapted on the closing of the second circuit to actuate said bolt to release the closure tor actuation by said spring to 'arry said push-stem out oi" circuit openiir;- engagement with the Fecond switch, and means having connection with the closure and with the audible signal to actuating said signal when the closure is released and actuated by said spring.

In testimon whereof, I have signed my name to this speciti 'ation.

()SCAJK SANDWEISS.

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